From: Oscar Mateo <oscar.ma...@intel.com>
This is a hard one, since there is no direct hardware ring to
control when in Execlists.
We reuse intel_ring_idle here, but it should be fine as long
as i915_add_request does the ring thing.
Signed-off-by: Oscar Mateo <oscar.ma...@intel.com>
---
drivers/gpu/drm/i915/intel_lrc.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 051e150..58a517c 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -92,6 +92,28 @@ logical_ringbuf_get(struct intel_engine_cs *ring, struct
intel_context *ctx)
return ctx->engine[ring->id].ringbuf;
}
+static void logical_ring_stop(struct intel_engine_cs *ring)
+{
+ struct drm_i915_private *dev_priv = ring->dev->dev_private;
+ int ret;
+
+ if (!intel_ring_initialized(ring))
+ return;
+
+ ret = intel_ring_idle(ring);
+ if (ret && !i915_reset_in_progress(&to_i915(ring->dev)->gpu_error))
+ DRM_ERROR("failed to quiesce %s whilst cleaning up: %d\n",
+ ring->name, ret);
+
+ /* TODO: Is this correct with Execlists enabled? */
+ I915_WRITE_MODE(ring, _MASKED_BIT_ENABLE(STOP_RING));
+ if (wait_for_atomic((I915_READ_MODE(ring) & MODE_IDLE) != 0, 1000)) {
+ DRM_ERROR("%s :timed out trying to stop ring\n", ring->name);
+ return;
+ }
+ I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING));
+}
+
static int logical_ring_flush_all_caches(struct intel_engine_cs *ring,
struct intel_context *ctx)
{
@@ -604,10 +626,13 @@ static int gen8_emit_request_render(struct
intel_engine_cs *ring,
void intel_logical_ring_cleanup(struct intel_engine_cs *ring)
{
+ struct drm_i915_private *dev_priv = ring->dev->dev_private;
+
if (!intel_ring_initialized(ring))
return;
- /* TODO: make sure the ring is stopped */
+ logical_ring_stop(ring);
+ WARN_ON((I915_READ_MODE(ring) & MODE_IDLE) == 0);
ring->preallocated_lazy_request = NULL;
ring->outstanding_lazy_seqno = 0;
--
1.9.0
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx
